CVE-2017-5340: Integer Overflow
First published: Wed Jan 11 2017(Updated: )
Zend/zend_hash.c in PHP before 7.0.15 and 7.1.x before 7.1.1 mishandles certain cases that require large array allocations, which allows remote attackers to execute arbitrary code or cause a denial of service (integer overflow, uninitialized memory access, and use of arbitrary destructor function pointers) via crafted serialized data.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/php | <7.0.15 | 7.0.15 |
| redhat/php | <7.1.1 | 7.1.1 |
| PHP | <7.0.15 | 7.0.15 |
| PHP | >=7.0.0<7.0.15 | |
| PHP | >=7.1.0<7.1.1 | |
| IBM Data ONTAP |
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Reference Links
- http://www.securityfocus.com/bid/95371
- http://www.securitytracker.com/id/1037659
- https://access.redhat.com/errata/RHSA-2018:1296
- https://bugs.php.net/bug.php?id=73832
- https://github.com/php/php-src/commit/4cc0286f2f3780abc6084bcdae5dce595daa3c12
- https://security.netapp.com/advisory/ntap-20180112-0001/
- https://www.php.net/ChangeLog-7.php#7.0.15 (Advisory)
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1412647
- http://php.net/manual/en/function.unserialize.php
- https://bugzilla.redhat.com/show_bug.cgi?id=1412631
Frequently Asked Questions
What is the severity of CVE-2017-5340?
CVE-2017-5340 has a high severity rating due to its potential to allow remote code execution and denial of service.
How do I fix CVE-2017-5340?
To fix CVE-2017-5340, upgrade PHP to version 7.0.15 or 7.1.1, depending on your current version.
What versions of PHP are affected by CVE-2017-5340?
CVE-2017-5340 affects PHP versions prior to 7.0.15 and 7.1.x before 7.1.1.
What issues does CVE-2017-5340 lead to?
CVE-2017-5340 can lead to integer overflow, uninitialized memory access, and potential execution of arbitrary code.
Is it safe to use PHP versions below the patched versions for CVE-2017-5340?
Using PHP versions below 7.0.15 or 7.1.1 is not safe due to the vulnerabilities present in those versions.
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